<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avatar_box">
        <!--  头像区域 -->
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录验证表单区域 -->
      <el-form
        class="login_form"
        :model="loginForm"
        :rules="loginFromRules"
        ref="loginFormRef"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="el-icon-s-custom"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            type="password"
            v-model="loginForm.password"
            prefix-icon="el-icon-lock"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
// 行为区域
export default {
  data() {
    {
      return {
        //这是数据登录表单的绑定登录对象
        loginForm: {
          username: "",
          password: "",
        },
        //   这是表单的验证规则对象
        loginFromRules: {
          //   验证用户名是否合法
          username: [
            { required: true, message: "请输入用户名称", trigger: "blur" },
            {
              min: 3,
              max: 10,
              message: "长度在 3 到 10 个字符",
              trigger: "blur",
            },
          ],
          //验证密码是否合法
          password: [
            { required: true, message: "请输入密码", trigger: "blur" },
            {
              min: 5,
              max: 15,
              message: "长度在 5 到 15 个字符",
              trigger: "blur",
            },
          ],
        },
      };
    }
  },
  methods: {
    //   点击重置按钮重置表单
    resetLoginForm() {
      // console.log(this)
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        if (res.meta.status !== 200) return this.$message.error("登录失败");
        this.$message.success("登录成功");
        window.sessionStorage.setItem("token", res.data.token);
        this.$router.push("/home");
      });
    },
  },
};
</script>

<style lang='less'  scoped>
/* 如果只想组件内生效则需要在style中加入scoped */
.login_container {
  background: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0%;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>